Azure AD Backup

[JoSo]

Is it usefull to backup Azure AD Device Objects (and possible to restore them). eg. for retrieval of bitlocker keys. Is it possible for a remote user to login again in an Azure AD joined device after such a restore?

[#2]

For disaster recovery purposes, we have put many resiliency measures in place to prevent such a thing from occurring. Mark Russinovich goes into detail about how this works here:
https://azure.microsoft.com/en-us/blog/advancing-service-resilience-in-azure-active-directory-with-i...

In situations where users and objects have been accidentally deleted, there are ways you can restore these:

https://docs.microsoft.com/en-us/azure/active-directory/fundamentals/active-directory-users-restore

https://docs.microsoft.com/en-us/azure/active-directory/enterprise-users/users-bulk-restore